Thanks Bryron and Mos for your responses, I found the .jar file and adjusted my data-sources.xml file. Looks good, now when I run the CartClient I get this: Communication error: Lookup error: java.lang.SecurityException: Invalid username/password. Bryon you mentioned about the user being "sa" and password being "" do you have any ideas? In the principals.xml mentions about about different users and their passwords. I played with these two, but nothing seems to make a difference! When I run ProductClinet I get this: Exception in thread "main" java.lang.NoClassDefFoundError: ProductClient Also, do I need to adjust any files for this line: shema="database-schemas/hypersonic.xml"? Is there away I can test that the UserManager is installed right? Wanting to learn, Debra ------------------------------------------------------------------ Hi Debra Extract hsql.jar out of the hsql.zip you downloaded and copy that into the Orion/lib directory <data-source name="Default data-source" class="com.evermind.sql.ConnectionDataSource" location="jdbc/DefaultDS" pooled-location="jdbc/DefaultPooledDS" xa-location="jdbc/xa/DefaultXADS" ejb-location="jdbc/DefaultEJBDS" * url="jdbc:HypersonicSQL:defaultdb" connection-driver="org.hsql.jdbcDriver" * username="sa" * password="" schema="database-schemas/hypersonic.xml" /> Differences in the hypersonic entry in my data-sources.xml are marked with an asterisk above. Default database name is "defaultdb", default user and password are "sa" and "".